Automatic drajyt begttiiatoe



Get. 9, 1923. 13,470,325

G. H. HUSTON AUTOMATIC DRAFT REGULATOR Filed June 23, 1920 FIG: Z

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Patented @ct. 9, i923.

ill ll l) il "il 2a land he" GEORGE H. HUSTON, 01* CIlIJDININATI, OHIO.

AUTOll/IATIO DRAFT REGULATOR.

Application filed June 23, 1920.

To all whom it may concern:

Be it known that I, Gnonen H. HUs'roN, a citizen of the United States, residing at the city of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Automatic Draft Regulators, of which the following is a specification.

My invention belongs to that class of draft regulators which are placed in smoke passages.

My new regulator for drafts is automatic in action at all times, and always allows a certain percentage of circulation.

I claim from practical experience that a draft in a flue should be so that there is circulation at all times, and the circulation should be decreased when a hot fire is built so as to keep a uniformity of draft, this not only prevents overheated furnaces and stoves, but saves fuel and also prevents fires.

By using my device a circulation is always provided.

I provide no adjustments for regulating the device at any time as it automatically adjusts itself as needed according to the amount of flue area needed by the degree of fire intensity and heat.

lts various :leatures and advantages will readily become appa 'ent from the following spccilication.

In the accompanying drawing forming part of this specification:

Fig. l, is a front view of the device,

Fig. 2, a side view of the same,

Fig. 3, a section on the line 3-8 of Fig. 1,

Fig. 4:, is an isometric view of the valve or regulator of the device; and

Fig. 5, is an isometric view of the device in its entirety.

The device is made like a cap and is formed of a short pipe or ferrule l, liu'ovided with a peripheral rim or collar 2, being preferably of greater diameter than the short pipe 1 and is provided with hole 3 which communicates with the hole in the short pipe part l. but is not as great in diameter and extent.

it the front of the device, ll provide a curved handle 4;, provided with a slot 5, said handle being riveted to the rim 2, by rivets 6.

At the top on the inside where the rim 2 and pipe 1, meet, I hinge a damper, valve or regulator 7, by means of a hinge 8, so that said regulating damper 7, will swin Serial No. 391,200.

This valve or regulator T is usually annular in form and is larger or greater in diameter than the hole 3 in the rim 2.

' To the bottom of the valve or regulating damper 7, l rigidly connect at 10. one end of a guide arm 9, said guide arm extending up and out through the slot and terminating in end 12.

it will be noted that at the end 10, where the guide rod 9, isconnected to the valve 3, it is made full and preferably slightly greater in diameter, so that when the valve or damper 3 tries to abut against the inside of rim 2, it is prevented from doing so, (see Fig. 5) where the parts are shown in a normal position.

The wire guard rod 9, keeps the valve regulator 7 in alignment and position so that it will not become locked laterally in the pipe or flue, and the slot 5 is of such a width that only enough play is allowed to enable the valve 7 to swing properly the dotted lines in Fig. 3, showing the valve or damper swung back to allow of greater air circulation.

The valve or regulator 'Z, is so placed. that it is evenly poised or counter-dialancod, the end part 10, holding it open slightly so as to always provide a small dogma. of circulation. I have no weights on the valve or damper T or no strain or rer'sistaucc overcome. l find in practice that the sh ed weightat the bottom of the dun valve will cause it to remain closed just long enough to break the siphonage that is in the flue and when it is broken. the circulation is stopped, thereby causing the flue. to become air bound.

My cap can he placed at any angle, and in a l' joint of a regular ,tluc'and it works constantly without any further adjustment, the valve closes back against the cap which prevents any down draft from blowing soot out, the cap can be removed, which will pro vide a siphonage of air so as to keep the flue dry during summer months, when the fire is not in use. hfy device is never entirely closed so therefore it prevents the chimney fromv becoming airbound, this is caused by cold damp air and causes stoves and furnaces to smoke when a fire is being, started, as the cold air is heaviest and acts as a valve against the upper movement of the smoke, by constant siphonage or circulation in the flue, which is caused from the cellar being warmer than the outside atmosphere, these conditions cannot exist where my automatic flue device is used.

In all stoves, furnaces and the like much annoyance and inconvenience is felt when high winds prevail, on account of the increased draft of the air burning the fuel faster. In a case like this my valve 7, is in a position as shown in Fig. 5, and the draft of the fire is normal; but when the high winds exist, the valve swings inwardly and the flue excess draft is drawn, in through the hole in the cap, instead of increasing the draft at the fire, this increased draft at the fire cannot exist, where my automatic device is in use; the draft upon the fire being steady and constant. The valve 7, also swings inward and back again to normal, according to the amount of pressure behind it, produced by the varying intensity of the heat and draft created.

In Fig. 5, the valve 7 is shown in its normal position and the small space left between the valve 7 and the rim 2, will not interfere with the starting of the fire, inasmuch as enough draft will be present to carry off the smoke, and as the flue becomes hotter, or the resistance behind the valve is removed from any source, the valve will swing backward, so as to give the required flue airing for proper combustion; this valve operates automatically and always allows a minimum degree of circulation and maximum degree of circulation when needed.

This cap and draft regulating device can be used in any pipe employed for carrying oft smoke and waste products of combustion; for example, all fines are provided with a clean-out at the bottom, this cap can be placed at this point by removing the old solid cap and placing my cap with the automatic damper in its place; and it will prevent the accumulation of soot in the flue as well as preventing an airbound condition of the valve.

What I claim as new and my invention and desire to Secure by Letters Patent is:

1. In an automatic flue regulator, a cap capable of fitting in a flue, provided with an opening therein, a movable damper mounted in said cap, means for causing said damper to remain partly off its seat at all times, and means for guiding said damper to prevent the same from binding in said cap.

2. In an automatic flue regulator, an apertured cap adapted to be inserted in an opening in a flue, a disk damper pivotally mounted in said cap and adapted to partially close the aperture in the cap, means for holding said damper partially off its seat at all times-to permit a constant circulation of air past the damper and into said cap and means for guiding said damper to prevent the same from binding in said cap.

3. An automatic flue regulator for admitting air to the flue of a furnace or the like comprising a short pipe adapted to be inserted in an opening in a flue, a rim connected to said short pipe and provided with an air admission aperture, a disk damper having its upper end pivotally mounted within said short pipe, a guiding member mounted on said rim, and a rigid arm rigidly connected to said damper and cooperating with said guiding member for preventing binding of the damper within said short pipe and for guiding the damper in a plane perpendicular to the axis of the damper pivot when said damper moves.

4. An automatic flue regulator including a short pipe adapted to be inserted in an opening in a flue, an apertured rim arranged at one end of said short pipe, a disk damper having its upper edge pivotally mounted within said short pipe and adapted to cooperate with the aperture in said rim for controlling the admission of air to said short pipe, a rigid handle having its ends rigidly connected to said rim and provided with a guiding slot, and a rigid arm extending through said slot and having one of its ends rigidly connected to the lower portion of said damper for holding the damper partially off its seat at all times.

In testimony whereof, I aflix my signature at Cincinnati, Ohio, this 19th day of June, 1920.

GEORGE H. HUSTON. 

